TY - JOUR A1 - Kudron, Michelle A1 - Gevirtzman, Louis A1 - Victorsen, Alec A1 - Lear, Bridget C. A1 - Gao, Jiahao A1 - Xu, Jinrui A1 - Samanta, Swapna A1 - Frink, Emily A1 - Tran-Pearson, Adri A1 - Huynh, Chau A1 - Vafeados, Dionne A1 - Hammonds, Ann A1 - Fisher, William A1 - Wall, Martha A1 - Wesseling, Greg A1 - Hernandez, Vanessa A1 - Lin, Zhichun A1 - Kasparian, Mary A1 - White, Kevin A1 - Allada, Ravi A1 - Gerstein, Mark A1 - Hillier, LaDeana A1 - Celniker, Susan E. A1 - Reinke, Valerie A1 - Waterston, Robert H. T1 - Binding profiles for 961 Drosophila and C. elegans transcription factors reveal tissue-specific regulatory relationships Y1 - 2024/12/01 JF - Genome Research JO - Genome Research SP - 2319 EP - 2334 DO - 10.1101/gr.279037.124 VL - 34 IS - 12 UR - http://genome.cshlp.org/content/34/12/2319.abstract N2 - A catalog of transcription factor (TF) binding sites in the genome is critical for deciphering regulatory relationships. Here, we present the culmination of the efforts of the modENCODE (model organism Encyclopedia of DNA Elements) and modERN (model organism Encyclopedia of Regulatory Networks) consortia to systematically assay TF binding events in vivo in two major model organisms, Drosophila melanogaster (fly) and Caenorhabditis elegans (worm). These data sets comprise 605 TFs identifying 3.6 M sites in the fly and 356 TFs identifying 0.9 M sites in the worm, and represent the majority of the regulatory space in each genome. We demonstrate that TFs associate with chromatin in clusters termed “metapeaks,” that larger metapeaks have characteristics of high-occupancy target (HOT) regions, and that the importance of consensus sequence motifs bound by TFs depends on metapeak size and complexity. Combining ChIP-seq data with single-cell RNA-seq data in a machine-learning model identifies TFs with a prominent role in promoting target gene expression in specific cell types, even differentiating between parent–daughter cells during embryogenesis. These data are a rich resource for the community that should fuel and guide future investigations into TF function. To facilitate data accessibility and utility, all strains expressing green fluorescent protein (GFP)-tagged TFs are available at the stock centers for each organism. The chromatin immunoprecipitation sequencing data are available through the ENCODE Data Coordinating Center, GEO, and through a direct interface that provides rapid access to processed data sets and summary analyses, as well as widgets to probe the cell-type-specific TF–target relationships. ER -